pop vs shift on a array (v19)

Revision 19 of this benchmark created on

Description

If you can choose between a .pop() or .shift() on a Array, what would be a wise decision?

As my http://jsperf.com/adding-items-array/6 test shows the unshift is awful for performance. The same counts for .shift(), awful performance.

Test runner

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Testing in
TestOps/sec
.pop()
var array1 = new Array(2000);
var i = array1.length;
while (i--) {
 array1.pop()
}
ready
.shift()
var array1 = new Array(2000);
var i = array1.length;
while (i--) {
 array1.shift()
}
ready
.splice beginning
var array1 = new Array(2000);
var i = array1.length;
while (i--) {
 array1.splice(0, 1)
}
ready
for loop
var array1 = new Array(2000);
var len = array1.length;
for (var i = 0; i < len; i++) {
 var tmp = array1[i];
}
ready

Revisions

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